Draft conditioner



H. GOJLDBERG 1,850,064

DRAFT CDNDIIIONER March 15, 1932.

- Filed Sept'. 11, 1950 4 Sheets-Sheet l March 15, 1932. GOLDBERG 1,850,064

DRAFT CONDITIONER Filed Sept. 11. 1930 4 Sheets-sheaf 2 March 15, 1932.

H. GOLDBERG DRAFT CONDIT I ONER Filed Sept. 11. 1930 4 Sheets-Sheet 5 Zia/ 672w??- 7441mm March 15, 1932. H. GOLDBERG DRAFT CONDITIONER Filed Sept. 11, 1930 4 Sheets-Sheet 4 Patented 'Mar. 1 5, J 1 932.

UNITED smg'rns PATENT. OFFICE HERMAN GOLDBERGyOFGHICAGO, rumors, ASSIGNOR'TO woLrrooAL SAVERCOIL' PANY,.OFCHIGAGO, rumors, A conronArroN or DELAWARE.

DRAFT CONDITIONER -App1ication filed September 11,1930. Serial No. 481,111.

My inventionrelates to draft regulating mechanism and one'of'the objects is the provision of improved and efficient automatic.

' purpose of supplying fuel thereto.

Another" object of the-invention is the provision of automatic means for temporarily opening wide the damper when fuel is first supplied to the furnace and then permitting the damper to move to an intermediate position which it is to occupy during the operation of the furnace.

Afurther object of the invention is the provision of draft regulating mechanism comprising a damper combined with aretarding device to effect unovementof the damper from a- Wide openposition or'temporary' running position to anqintermediate or normal running position. I v

Another object of the invention is the provision of means for electro-ma'gnetically operating adamper and controlling such operation in unison withthe opening and closing of a furnace door of a heating sys tern. V V I Other objects of the invention will appear hereinafter; the novel features and combinations' beingset forth in the appended claims.

In the accompanying drawings- Fig. 1' is an elevational view of my improved electrdmagnetic mechanism for operating a- ,damper, parts being shown in position when the damper is substantially closed;

Fig. 2 is an enlarged side-'el'evational view of the electro-magnetic damper operating mechanism, parts being broken away to show details of the interior construction;

Fig. 3' is an elevational view similar to Fig.1, but with the electro-magnet energized for movement of the damper to its initial temporarily Wide openposition;

- Fig; 4 is a viewsimilar'toz Fig. illustra ting the position that the parts will take-after the 'electro-magnet has been energized and the retarding device has permitted the damper to move to its intermediate or normal running position; 1

Fig. 5 is a perspective view of a furnace with my improvements combined therewith;

Fig. 6 is anenlarged detail view in plan showing the door operated switch control box' 1 Fig. 7 is an elevational view of the switch control box with the cover removed;

Fig. .8 is a side elevational view at the switch control box with a portion broken 'away to show the pilot. lamp; and

' Fig. 9 is a diagrammatic view of the circuits and connections of the control system embodied in the arrangement shown in Fig. 5. I

Referringto Figs. 1 and 5 it will seen. that a flue 10 which leads from the furnace 11 is provided with a damper 12 which when in its dotted line position shown in Fig.- 1 is in its so-called closed'p'osition. Fig. 2 being a sectional view taken on the line -2-2 of 'Fig. 1 shows openings at1'3 and 14.

between the damper l2 and the upper and lower interior walls of the flue 10. Openings may be provided at 15, for ingress of air and travelthereof along narrow chambers in zigzag, paths to the interior of the flue 10', but this-construction is no partof the present invention.

The upright position of the damper 12 shown in dotted line in Fig. 1 and elevation in Fig. 2 is the position that the damper occupies when the furnace is banked. The spaces around the damper including those designated 13 and 14' in Fig. 2 are suflieient to afford ample draft when the furnace is banked. The damper 10' is secured to a-rock shaft 16 which is mounted in suitable bearings'of the flue 10'.

Tothe rock shaft 16 is secured a lever, one arm 19 of which is provided with an adjustable Weight 20' and the-other arm 21 of which is provided with a transverse pin 22. The

lateral ends of the pin 22 project through are pivoted at 25, 25 to the upper end of the plunger 26 which extends downwardly into V the solenoid 27.

' upper endagainst the stop screw 28. The

latter is adjustable relatively to the stationary bracket 29 and may be secured in adjusted position by means of the lock nuts 30, 30.. i

A detachable casing 31 entirely encloses the solenoid 27, the plunger 26, the links 24 and the arm 21, but the arm 19 projects through a slot in the left hand portion of the casing 31 and this slot permits sufficient freedom of movement of the arm 19 to enable it to move from its position shown in Fig. 1 to its position shown in Fig. 3,

The upper end of said slot is illustrated by a dotted line at 32 in Fig. 1. 7 Such upper end may be relied onto prevent movement of the arm 19 to a position where the pin 22 will be in alinement with the pivots 16 and 25. Such limiting position is shown in Fig. 3.

WVhen the electro-magnet comprising the solenoid 27 and the plunger 26 is energized the rapid downward movement of the plunger 26 from the position shown in Fig. 1 will cause the parts to assume the position shown in Fig. 3. The momentum of the weight 20 will be suflicient to throw the arm 19 to its uppermost position against the 21 is moving downwardly and until such plunger reaches the lower limit of its stroke shown in Fig. 3, whereupon the momentum of the weight 20 will cause the pin 22 to ride toms of the slots 23.

along the slots 23 until such pin is at the lower ends of these slots as shown in Fig.3

or until the arm 19 strikes against the stop 32. If desired, the arm 19 may strike against the stop 32 before the pin 22 reaches the bot- When the door of the furnace is opened as hereinafter more fully described, the solenoid 27 is energized and the damper12 is moved to its wide open position or horizontal position as shown in Fig. 3,which is the temporary running position. This movement is effected by the energization of the electro-magnet and the consequent momentum exerted by the weight 20.

After the positions of the parts shown in Fig. 3 have been attained it is desirable that the weight 20 should move downwardly with a retarded movement, so that the damper 12 during operation of the furnace will occupy the position shown-in Fig. 4, which position is the normal running position.

As shown inFig. 2 friction discs 33, 33,

preferably of fibrous material, are mounted on the end portions of the pin 22 between the lateral ends of the arm 21 and the upper ends of the links 24. A bolt 34 extends freely through openings in the links 24 and its screw threaded end is provided with a compression spring 35. Two nuts 36, 37 are mounted on a screw threaded end of the bolt 34 and the head 38 of the bolt acts as an abutment. It will thus be seen that the spring 35 presses the links 24 toward each other and against the friction discs 33. The pin 22 extends through perforations in the centers of the friction discs 33.

When the electro-magnet is energized, its

plunger 26 is suddenly pulled down'and the .weight 20 consequently flies quickly to its uppermost position shown in Fig. 3. The weight 20 then starts to descend, but this movement is retarded by the reason of the braking action afforded by the friction discs and the spring pressed links 24 associated therewith. The damper 12 will therefore move slowly from its horizontal or wide open position shown in Fig. 3 to its slanting or normal running position shown in Fig. 4. During this movement of the damper from its temporary running position to its normal running position, the furnace door is opened for the purpose of manually supplying fuel to the furnace. By means of the nuts 36 and 37 the retarding action on the damper may be regulated so that by the time that a fireman is through supplying fre-sh fuel to the cured to the front of the furnace and is provided with a reciprocating rod 40 which projects from the lower left hand portion of the switch box so as to be in position to be en-; .gaged by the arm 41 which is secured to the furnace door 42 near the hinge axis 43 thereof. When the door 42 is closed the arm 41 moves on the vertical axis 43 in a clockwise direction and by engaging the outer end of the rod 40 pushes the latter toward the right against the action of the spring 44 in the switch box. a

The rod 40 is connected at 45 to an upright lever 46, the lower end ofwhich is pivoted at 47 to the bottom of the switch box.

The upper end of the lever 46 has a pin and slot connection at 48 with a mercury switch which is pivoted at 49 to the rear wall of th switch box. I V

Fig. 9' is. a wiring diagram ofthe; circuits and connections: for. the. switch box. and the electrwmagnet. which. operates theldanrper 12.. The main line switch 50: adapted. to,-

connect: the supply mains; 5.1 to the conductors 52' and 513. The main line switch 50 maybea snap switch operableby' means of a lever 54' projecting through the cover 550i theswitch box 319.; The conductor 53 is: connected to one terminal of the mercury switch 56,. the other terminal of which is connected to the conduc- I respectively connected to. the terminals 64 and" 65. which, inturn, are connected-to. the conductors 66 and 67 leading tothe terminals of the solenoid 27.

The, mercury'switch 56-is in its closed position when tilted as shown in Fig. 7 in. full lines. This corresponds: to the open position of the furnace door 42. When thezlatter is closed the arm 41 pushes the. rod 40' toward theright againstthe action of the; spring 44, whereupon the lever 46 and-'the mercury switch 56. will be moved to theirdotted line position-s shown in Fi 7, thereby opening the. mercury switch.

In Fig; 9 the main line switch 50.: and the mercury switch 56' are both shown in their open position. The plunger26 will thenbe in its: uppermost position and the damper: 12 will be in. itsbanked position. Ifthe main line switch 50- is closed while the furnace door is. closed, the mercury switch. 56, being in the,

return conductor 53,.willkeep both the solenoid and the lamp 63cut'ofl from the supply mains 51. The lamp 63 is in parallel with the solenoid 27. Theretore, as: soon as the furnace door isopened an-d'thespring 44 acts to. close the mercury switch 56, the pilot lamp 63. will be lighted up and this may be observed through the pilot window 68 in; the upper end of the cover 55. of the switch box: The

energization of the electro-magnet of the the furnace attendant may move the-check door 69 in one side of the flue 10 to various positions on its hinge 70 by means of the chain or draft connection 71 which is trained over pulleys 72, 7 3 to a stationary anchorage 74 when the check door 69 is closed. For holding the check door 69 in various posi tions the free end of the chain 71 may be connected to the anchorages 75,76, 77 and 78' which are located at various elevations.

It isalso; desirable to operate the. damper 12 manually to various." positions: in. accordance with the weather conditions. For this purpose a chain. 79 is connected to the. weight arm 19 as-shown in Fig: and trained over pulleys 80,. 8'1 and connected at: 82 to the extension 8-3, preferably consisting of a flexible metal cable, the lower end of which connectedto the pulley 84 at 85 and wound around. such pulley.

The pulley 814 is secured to. a rock shaft86 which is mounted inbearings 87 and '88. in

theswitchbox 39. Secured to the outer end of the rock shaft 86: an operating lever "89 f which is provided with an extension arm 90' having a pin 91 adapted to: fit into one of the four openings 92, 93,. 94 and. 95: inthe right hand outer side of theswitch box- The inner end of the. rock shaft: 86. is provided with a. collar 96 between which and the hearing 87? is locateda compression spring '97. This: springtends to move the-pin 91 into one of the openings: 92, 93',-.9i4- or 95' when the lever 89is released.

When the lever 89' is swung in an anticlockwise direction,. as. viewed in Fig. 8,. the pulley 84 will be moved correspondingly and this operation sl'ackens the. cable 83 and. the chain 79 and therefore permits. the weight 20 to move the damper 12 toii ts banked position as. shown-in Figl. The arrangement is such that the damper 12 is: free to move to its banked position when the pin 9-1 is: in the recess 92-: shown in Fig. 8;. I

By moving the lever'89fron1its banked position, so that the pin. 91 rests: in the recess 93, the pulley '84 willfbe. moved clock wise to. exert a pullon the chain 79 andthere- *by liftthe weight .20 tomove the damper to a partially open position corresponding to that desired for mild weather. a When the weather is cold and. an increased draft is desired, the pin-9l may be moved so that it. will restv in the recess 94 marked Gold. This movement of'the lever 89 will move the damper 12. to a more open position.

By moving the lever 8.9 to its full line position shown in Figs-8 where; the pin 91. will .rest in the recess. 95,; thed'amper maybemoved to any desired position, depending upon the predetermined connections: between the pulley 84. and the weight arm 19. For

instan ce, theindex 92 maybe for setting the damper in the: position shown in Fig. 1; that is, the banked position. The index 93. may

be for setting the: damper in a position intermediate that shown in Fig. 1 and that shown in Fig; 3. .The index 93; may be for setti'ng the damper, in the position shown in Fig. 4 correspondingto the normal running position. When the weather: is extremely cold the damper may be set to its: widest open position, shown Fig.3. v It should be particularly noted that when themanually operated mechanismhetween the switch box and the damper is used to set the damper in its various positions at 92,93 and 94there will be no interference with the electro-magnetic mechanism and the automatic operation thereof to vmove the damper to its wide open position whenever the furnace door is opened. This is because the chain 79. is connected to the upper side of the 7 weight arm 19 will merely cause temporary slack in the chain 79. The retarding mechanism will also operate automatically to;per-

unit the weight 20 to move the damper back to its running position.

Obviously those skilled in the art may make various changes inthe details and arrangement of parts without departing from the spirit and scope of the invention as. defined by the claims hereto appended and I wish therefore not to be restricted to the precise construction herein disclosed.

Having thus shown and described an embodiment of my invention what I desire to have protected by Letters Patent of the.

United States is 1. In a draft conditioner, the combination with a damper, of electro-magnetic mecha nism for operating the same, a control box, a lever, a rock'shaft connected to said lever and pivotally mounted in said box, means for holding said lever .in any one of a plurality of set positions, a member secured to said rock shaft, a cablehaving one end connected to said member and the other end to said damper to serve as a draft connection beerable switch in said box, a pilot light in said box, a window for said pilot light, and circuits and connections for effecting energization of said electro-magnetic mechanism to open the damper when said manual switch is closed and said spring-pressed push-rod is operated to close said mercury switch.

2. In a draft conditioner, the combination with a damper, of an electro-magnet comprising a solenoid and a plunger, and connections between said plunger and said damper to effect movement of the damper to wide open position when the solenoid is first energized followed by movement of the damper to an intermediate position while the solenoid. remains energized. j

3. In a draft conditioner, the combination with adamper, of an electro-magnet com.- prising a solenoid and a plunger, and means comprising a pin and slot connection between said plunger and said damper to effect initial comprising a solenoid and a plunger, a link pivoted to said plunger, and means comprising "a pin and slot connection between said link and said damper for effecting initial movement of the latter to wide openposition followed by movement thereof to an inter-' mediate position after said solenoid is energl'zed '1 5. In a draft condition-er, the combmation witha damper, of electro-magnet mechanism, means comprising a pm and slot connection between said damper and said electro-magnetic mechanism to permit movement of said damper to wide open position when said electro-magnetic mechanism is energized, and returning meansassociated with said pin and slot connection to effect a timed movement of said damper from wide open position to an intermediate position.

. 6. In a draft conditioner, the combination witha damper, of electro-magnetic mecha nism comprising an armature, spaced-apart plates each'pivoted at one end of said armature and each'having a slot in its other end, an actuating arm connected to said damper, a pin carried by said actuating arm and extending into said. slots, friction discs at the sides of said armrin engagement with the adjacent faces of said plates, and resilient means for pressing said slotted ends of said plates against. said friction discs.

7. In a draft conditioner, the combination with a damper, of a weighted arm connected thereto, an actuator, means comprising a lost motion connection betw'een'said actuator and said weighted arm to permit thelatter to move the damper to wide open position after operation of said actuator, and a springpressed friction device associated with said 'pin and slot connection to elfect retarded movement. of said damper'from its wide open position to a predetermined intermediate position.

In testimony whereof I have signed my name to this specification on this 8th day of September, A. D. 1930.

HERMAN GOLDBERG. 

